I just found at least one, maybe 2 BABY FISH in my planted 10 gallon aquarium Stock is as follows:

1 female betta
4 female platies
3 corydora catfish (sex unknown)

As I was laying in my bed today (reading) I looked at my tank and saw one of my platies chasing around a tiny little white thing. At first I just thought it was a particle of food or something but then I noticed it was actually darting around. I was intrigued and went to investigate. By this time the little white thing disspeared and the platy gave up on the chase. After a few minutes of close inspection I saw a little baby fish hiding in the back corner of the tank where I have a bunch of plants. I think the baby thing is about 1/8th of an inch? What could it be? I suspect it's platy fry but my platies are all female and have had no contact with males since I prought them from the local LPS. maybe 2 months ago? None of them ever looked pregnant either...

I'm just way too excited from seeing a baby fish in my tank. Feel like a daddy now lol. I really want to catch it and protect it from the adults but that would be impossible. The thing is tiny and my tank is heavily planted. I just hope the little guy(s) makes it!

Anything special I can do to care for it an increase its chances of survival?

Could be platy fry. Most livebearers can still have babies even 6 months after coming near a male. Could also be corydoras fry. Either way, they must be removed, and fed microworms or crushed up flakes.

Is it probably the corys. They breed quite easily. I think you can leave the fry in with the parents but because you have a betta you should qt the fry. Or maybe you could leave it in if the tank is heavily planted?

Definetly platy fry! Congrats! If there is enough cover with your plants they may survive. They can eat small flake food. Female livebearers can store sperm up to 6 months after being with a male, so no male has to be present for them to have fry. :)